sql-server - 当某些行不存在时如何计算平均值？

Question

请帮助创建一些值是 NULL 时的平均值

事实表:

立方体:

SELECT NON EMPTY {[Measures].[Score]} * [Date].[Month].allmembers ON COLUMNS
,{[Name].[name].allmembers} ON ROWS
FROM Test

问题:

当我计算平均值时，NULL 值被排除在外。我尝试了 COALESCEEMPTY()，但无论如何都无法正确计算平均值。 Score=0 不正确的月份的平均值。继承人的代码:

WITH
MEMBER [Measures].[DateCount] AS DISTINCTCOUNT([Data].[date].[date])
MEMBER [Measures].[ScoreX] AS COALESCEEMPTY([Measures].[Score],0)
MEMBER [Measures].[DateCountX] AS COALESCEEMPTY([Measures].[DateCount],0)
MEMBER [Measures].[AvgScore] AS IIF([Measures].[DateCountX]=0,0,[Measures].[ScoreX]/[Measures].[DateCountX])
 SELECT NON EMPTY {[Measures].[AvgScore]} * [Date].[Month].allmembers ON COLUMNS
 ,{[Name].[name].allmembers} ON ROWS
 FROM Test

请帮忙寻找解决方案。

Answer 1

可能像下面这样:

WITH 
MEMBER [Measures].[Score X] AS
  IIF(
    [Measures].[Data Count]=0
    ,0
    ,[Measures].[Data Count]
  )
MEMBER [Measures].[Data Count X] AS
  COUNT(
    [name].[name].CURRENTMEMBER
    *[Measures].[Score X]
  )
MEMBER [Measures].[Avg Score] AS
  DIVIDE(
    [Measures].[Score]
   ,[Measures].[Data Count X]
  )
...
...

如 Tab 所述，您可以对上面的第一个计算成员使用函数 COALESCEEMPTY:

WITH 
MEMBER [Measures].[Score X] AS
  COALESCEEMPTY(
    [Measures].[Data Count]
    ,0)
MEMBER [Measures].[Data Count X] AS
  COUNT(
    [name].[name].CURRENTMEMBER
    *[Measures].[Score X]
  )
MEMBER [Measures].[Avg Score] AS
  DIVIDE(
    [Measures].[Score]
   ,[Measures].[Data Count X]
  )
...
...